weird substance on removed ram

I installed two new gigs of ram tonight in my white Macbook and, while putting the Apple supplied ram away, I noticed a white, almost paint like substance covering the gold connection...bits. Sorry, I don't know all my terminology.

Anyway, I've installed ram in desktops before, but I've never seen something like this. It wiped away fairly easily, although I wish now that I'd taken pictures.

Has this happened to anyone else? I had searched the forums but I didn't see anything....

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